Machine for polishing rings.



Patented May 6, I902.

G. H. GASKINS.

MACHINE FOR POLISHING RINGS.

(Application filed Jan. 10, 1902.)

(No Model.)

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G. H. GASKINS. MACHINE FOR POLISHING RINGS. (Application 11881 Jan. 10, 1902. (No Model.) 2 Sheets-Sheet 2.

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A TTOHNEYS STATES PATENT ()rrrcE.

GEORGE H. GASKINS, OF PORTSMOUTH, VIRGINIA.

MACHINE FOR POLISHING RINGS.

SPEGIFIGATION forming part of Letters Patent No. 699,514, datedMay 6, 1902. Application filed January 10, 1902. Serial No. 89,189. (No model.)

T0 aZZ whom it may concern:

Be it known that I, GEORGE H. GASKINS, a citizen of the United States, residing at Portsmouth, in the county of Norfolk and State of Virginia, have made certain new and useful Improvements in Machines for Polishing Rings, of which the following is a specification.

My invention is an improvement in machines for polishing rings; and the invention consists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a top plan view, and Fig. 2 a side elevation, partlyin section, of a machine embodying myinvention. Fig. 3 is a cross-sectional view on about line 3 3 of Fig. 1. Fig. 4 is a detail elevation ofthe rear side of the upper portion ofthe ring table or carrier on the line indicated by the arrow in Fig. 3. Fig. 5 is a detail perspective view of one of the heads of the strap-carrier. Fig. 6 is a detail perspective view of the detent-pawl shown in Figs. 3 and 4:. Fig. 7 is an elevation of the ring-table, showing a different style of detent-pawl and Fig. Sis a detail perspective view of the detent-pawl shown in Fig 7.

In carrying out my invention 1 provide a ring-carrier for the rings to be polished, a polishing-strap A to operate between its ends on said ring, and a carrier for said strap, which is capable of reciprocation, as more fully described hereinafter. In the construction shown I employ a suitable framing, which includes a base B, having bearings for a shaft 0, which may be driven in any-suitable manner and is connected by means of a crank O and a pitman O with the recipro eating carrier for the strap A. I I also support on thebase B shears or guides D, upon which the strap-carrier reciprocates, and said strap carrier is formed with the opposite heads E, which may be alike, and one of which is connected with the pitman C by means of a bolt 0 passed through the openings in the head E and secured by a nut or in other suitable manner, as may be desired. The heads E are adapted at E to engage and slide along the guide-railsD and maybe preferably made cruciform, as shown, with one of the lateral arms E somewhat shorter than the arm E and the latter provided with an opening at e for one of the shanks of the intermediate brace for the opposite heads E. The shorter arm E is arranged at the rear for the purpose of bringing the points of connection of the polishing-strap nearer the rear side of the machine, and consequently nearer the ring-carrier, as will be understood from Fig. 1 of the drawings. The upper and lower arms'E and E are provided with openings 6 and e for the shanks of the'in'termediate brace, and the upper arm E is also provided near. its upper end with a non-circular opening E for the strap-carrying bar F, one of which is mounted in each of the heads E.

A brace extends between the opposite heads E and connects the same in such manner as to square the heads, so they will slide properly along the guide-rails and will not jam thereon as the strap-carrier is reciprocated. This intermediate brace G is provided at its ends with three shanks 9 g, and 9 which extend,

res ectivel throu h the o enin s e e and p y 23 b 3 7 e and receive the nuts gand g on the inner and outer sides of the heads E, so the said nuts may be tightened to adjust the heads in such manner as to causethe same to stand truly parallel and operate squarely upon their sides. This adjustment may be effected by loosening the nuts on one side of the heads and tightening them on the opposite side, as may be required.

As shown, the intermediate brace G is composed of the sections G and G the latter carrying the shanks g at its opposite ends and the section Gf carrying the shanks g and g at its opposite ends, and both sections G and G 'being secured together by bolts or rivets, as shown at G3 in Fig. 1. scribed construction I am able to adjust the 7 By the deopposite heads E of the carrier and to brace them apart, so they will operate squarely .upon their guide-rails.

The polishingstrap A maybe of 'cloth supplied with the polishing medium, which may be emery or other suitable material, held to the cloth by glue or in other suitable manner, or such polishing-strap may be of crocus cloth for Very fine work, and the opposite ends of the strap A are secured at a upon pins or other suitable devices on the bolts F, the said bolts being squared to fit in the openings E of the heads E, so they Will be held from turning, and the shanks f of said bolts being threaded to receive the nuts f, which secure the bolts and which bear against the springs F, whose upper ends are deflected to actuate the bolts F, as shown in Fig. 2, and whose lower ends are secured by the nuts g, which bind them to and against the outer sides of the heads E.

The polishing-strap A is looped or coiled at A around the ring or other object to be polished, and as the strap is moved longitudinally by the reciprocation of its carrier it will be caused to polish the ring and also to feed the ring, as will be described.

The ringH to be polished is held on a suitable carrier having a table I, forming a support for the ring, and the base of which is movable along ways J, which extend transversely in the direction of reciprocation of the strap-carrier, a screw J being arranged for operation to adjust the ring-carrier toward and from the strap to adjust or adapt the device for polishing rings of different sizes. In operation the ring is placed on the table I and a keeper K in the form of a bar is secured between its ends by a nut K, so its ends will overlap the ring and retain it upon the table. A pawl or detent is arranged to permit the movement of the ring rotarily in one direc tion, but to lock it from movement in the opposite direction. This pawl may be a plate L, as shown in Figs. 3, 4E, and 6, pivoted at one end at L upon aboltMand secured by a nut M and arranged at its free end at Z for the passage of the ring and to permit the movement of. the ring freely in the direction indicated by the arrow in Figs. 1 and 4 and to lock the ring -against movement in the opposite direction.-v

By this means as the strap A'is'moved in one direction it will cause a partial rotation of the ring H in the direction indicated by the arrow, Fig. 1, while the reverse movement of the strap will polish the ring, the latter being held from rotation at such time by the pawl, as before described. The pawl Zis adapted for use upon brass or similar soft metals, while in Figs. 7 and 8 I show a pawl adapted for use on iron, steel, or like harder metals.

This pawl N (shown in Figs. 7 and 8) maybesubstituted for the pawl Z, the bolt M being adapted to receive either of said pawls, as

will be understood from Figs. 3, 4:, and 7, the

machine being thus adapted for the treatment of soft-metal or hard-metal rings, as may be required.

In the operation of the invention it will be noticed that the strap A is so held that all slack is taken up by the action of the springs F, which exert a tension upon the devices which secure the opposite ends of the strap A, thus avoiding any injury to the strap which might result from its beingslack, and

also enabling me to adjust the tension of the.

strap as well as adjust the lengthof same to operate upon different sizes of rings, the adjustment of the length of the strap cooperating with the adjustment of the ring-carrier in a direction transverse to the path of the strap in securing an accurate adjustment of the strap to operate upon different sizes of rings, as may be desired.

While the invention'is especially designed for polishing metal and metal in the form of rings, it will beunderstood it may be employed forpolishing other materials and other forms, it only being necessary to furnish or adapt the work-holder I with or for means for receiving and holding the particular work to be operated upon.

I provide both heads E with openings e for the bolt 0 which secure the pitman C so the pitman may be connected with either end of the carrier, as convenience may require.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. An apparatus substantially as described comprising a carrier for the polishing-strap provided with opposite heads having the plurality of openings for the shanks of the intermediate brace, the intermediate brace having at its ends threaded shanks passing through the openings in the opposite heads, the nuts on said shanks on opposite sides of 'the heads, the springs on the outer sides of the heads and held by the nuts thereof and deflected to operate upon the strap-holding bolts, the strap-holding bolts and their nuts, the guideways upon which the strap-carrying heads reciprocate, means for reciprocating the carrier and means for holding the Work to be operated upon substantially as set forth.

2. The combination in a machine substan- 3 tially as described of a reciprocating strapcarrier, guideways for said carrier,- andaringholder provided with means for securing the 1. ring in a plane approximately parallel with the direction of movement of the strap-carrier whereby the ring will be secured with its 3 axis at a right angle to the line of movement of the strap-carrier substantially as set forth.

3. The combination of the reciprocating carrier for the polishing-strap having opposite heads, devices for securing the opposite ends of the strap, said devices being movable in the opposite heads of the carrier, and springs by which to give tension to said strap securing devices substantially as set forth.

4. The combination in an apparatus substantially as described with the opposite carrier-heads of an intermediate brace extending between said heads and provided at its ends with the three threaded shanks extending through the heads, and nuts on said shanks on opposite sides of the heads, substantially as set forth.

5. In an apparatus substantially as described the combination with the strap-carrier heads of the bolts movable in said heads and provided with means for securing the ends of the polishing-strap, and the springs acting upon said bolts whereby to give ten- 6. A machine substantially as described comprising the reciprocating carrier provided With means for securing the opposite ends of a polishing-strap and means for supporting said carrier of a ring-holder having a support and securing means for the ring, and a detent for said ring adapted to permit the same to turn in one direction and to lock it from turning in the opposite direction substantially as set forth.

7. The combination in a machine substantially as described with means for supporting the ring to be polished, of detent mechanism by which to lock said ring from turning in one direction and to permit it to turn in the opposite direction substantially as set forth.

8. In a machine substantially as described the combination of a table for supporting the ring, a keeper arranged at its ends to overlap the ring and hold it upon the table, and means for securing the keeper substantially as set forth.

9. The combination of the ring holder,

means for securing the ring, and a detent pawl arranged to operate on the ring and to prevent. the same from turning in one direction, substantially as set forth.

10. In a machine substantially as described the combination of the reciprocating carrier for the polishing-strap, a holder for the work to be polished and guides for said holder extending in a direction transverse to the path of the strap-carrier and means for adjusting the work-holder substantially as set forth.

11. The combination in a machine substantially as described ofthe reciprocating carrier, a polishing-strap connected at its ends with the said carrier and adapted between its ends to be looped around the Work to be p01- ished, and a holder for such work substantially as set forth.

GEORGE r1. GASKINS.

Witnesses:

SoLoN O. KEMON, PERRY B. TURPIN. 

